What is the difference in tie in and hair elastic?

A tie-in, often referred to as a hair tie or hair band, is typically a flexible band made of elastic material designed to hold hair in place. Hair elastics can vary in thickness, material, and design, often featuring decorative elements or varying levels of stretch. The main difference lies in their specific use: while both serve to secure hair, "tie-in" is a more general term that may refer to any method of tying hair up, whereas "hair elastic" specifically refers to the stretchy bands used for that purpose.